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RyanMcGreal
on March 25, 2011
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CAPTCHAs decrease conversion rates
If timestamp analysis is effective now, it won't be forever. It would be trivially easy to program an autofiller to leave pseudo-random pauses between filling individual fields. If this becomes a much more common technique, the spammers will adapt.
JonnieCache
on March 25, 2011
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This will greatly reduce the rate at which they are able to send the spam though, even if the delay is tiny. Similar to how bcrypt works.
smokinn
on March 25, 2011
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No it won't, not if their spambot is multi-threaded. (Which all the good ones are.)
All it will do is increase the latency, the overall throughput will be pretty much unaffected.
eli
on March 25, 2011
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Good point. Though keep in mind there are spam botnets with thousands and thousands of members.
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